#3F71DE#3F71DE

#3F71DE is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.3% C 0.175 H 263.4°. Best body text is #000000 at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#3F71DE
RGB	rgb(63, 113, 222)
HSL	hsl(221, 71%, 56%)
HSV	hsv(221, 72%, 87%)
CMYK	cmyk(71.6%, 49.1%, 0%, 12.9%)
CIE-LAB	lab(49.66, 19.88, -60.61)
CIE-LCH	lch(49.66, 63.79, 288.16°)
OKLab	oklab(57.29% -0.0202 -0.1741)
OKLCH	oklch(57.29% 0.175 263.4)
XYZ	xyz(21.1352, 18.1387, 71.4803)
Luminance	0.1814 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71DE #DEAC3F

analogous

#3FC0DE #3F71DE #5C3FDE

triadic

#3F71DE #DE3F71 #71DE3F

tetradic

#3F71DE #DE3FC0 #DEAC3F #3FDE5C

square

#3F71DE #DE3FC0 #DEAC3F #3FDE5C

split-complementary

#3F71DE #DE5C3F #C0DE3F

monochromatic

#183C8B #2153BF #3F71DE #7398E7 #A7BEF0

Accessibility & contrast

On white

4.54

#3F71DE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.63

#3F71DE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F71DE

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71DE	#FFFFFF	#000000	##000000
##3F71DE	1.00	4.54	4.63	4.63
#FFFFFF	4.54	1.00	21.00	21.00
#000000	4.63	21.00	1.00	1.00
##000000	4.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#327EE2

Deuteranopia (green-blind)

#006FDC

Tritanopia (blue-blind)

#008B9D

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f71de;
/* rgb */ color: rgb(63, 113, 222);
/* oklch */ color: oklch(57.3% 0.175 263.4);

Tailwind

colors: {
  custom: {
    50: '#8799e9',
    500: '#3f71de',
    950: '#000000',
  },
}

SCSS

$custom: #3f71de;
$custom-light: #8799e9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71de",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 222
  },
  "hsl": {
    "h": 221.132,
    "s": 70.667,
    "l": 55.882
  },
  "oklch": {
    "l": 0.5729,
    "c": 0.17524,
    "h": 263.4
  },
  "luminance": 0.18141
}

Semantic roles & 50–950 ramp

primary

#3F71DE

secondary

#DDC99B

accent

#B53AED

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #3F71DE

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →